Downloaded from www.Manualslib.com manuals search engine 45-23
Hydraulic unit, removing and installing
Note:
For easier disassembling and assembling, it is
more practical to remove the hydraulic unit
complete with brake servo and brake master
cylinder.
Removing
- Disconnect battery Ground (GND) strap.
- Separate all electrical connections on ABS
unit.
- Remove as much brake fluid as possible from
brake fluid reservoir using a suction bottle.
- Disconnect brake lines from ABS hydraulic unit
and seal threaded holes with plugs from repair
kit, Part No. 1HO 698 311.
- Remove left-hand trim under instrument
panel.
- Disconnect brake pedal from brake servo unit
Page 46-44 . Page 6 of 10Assembly overview - hydraulic unit, brake servo/brake master cylinder12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.45.4
Downloaded from www.Manualslib.com manuals search engine 45-24
- Remove nuts from brake servo/bulkhead.
- Carefully remove hydraulic unit and brake servo
with brake master cylinder from engine
compartment.
Installing
Note:
Hydraulic units supplied as replacement parts
are already filled with hydraulic fluid and bled.
Only remove sealing plugs on hydraulic unit
when the relevant brake line is going to be
connected.
If the sealing plugs are removed too early,
brake fluid can escape, it is then no longer
guaranteed that the unit is sufficiently filled or
adequately bled.
- Preassemble hydraulic unit and brake servo with tandem master cylinder away from vehicle.
- Secure hydraulic unit, brake servo with tandem
master cylinder to bulkhead.
- Connect brake lines.
- Reconnect all electrical connections on ABS unit (ensure correctly connected).
- Bleed brake system Page 47-27 .
- Install left-hand trim under instrument panel. Page 7 of 10Assembly overview - hydraulic unit, brake servo/brake master cylinder12/7/2004http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Goto&type=repair&id=VW.B4.SU01.45.4
